PCM-072/phyCORE-AM64xx System on Module
L-860e.A0
© PHYTEC America L.L.C. 2022
57
Table 28 phyCORE-AM64xx RMGII1 Trace Length Characteristics
Signal Name
SOM Trace Length (µm)
Match Group
Recommended Length Match
RGMII1_TXC
84161
RGMII1 Transmit
AVERAGE_LENGTH(TXCTL, TXD0, TXD1, TXD2, TXD3) +
1.8ns
RGMII1_TXCTL
84132
2540 µm
RGMII1_TXD0
84129
RGMII1_TXD1
84214
RGMII1_TXD2
83941
RGMII1_TXD3
83599
RGMII1_RXC
88087
RGMII1 Receive
AVERAGE_LENGTH(RXCTL, RXD0, RXD1, RXD2, RXD3) +
1.8ns
RGMII1_RXCTL
88204
2540 µm
RGMII1_RXD0
87978
RGMII1_RXD1
88179
RGMII1_RXD2
87966
RGMII1_RXD3
87918
T
able 29 phyCORE-AM64xx RMGII2 Trace Length Characteristics
Signal Name
SOM Trace Length (µm)
Match Group
Recommended Length Match
RGMII2_TXC
43684
RGMII2 Transmit
1
AVERAGE_LENGTH(TXCTL, TXD0, TXD1, TXD2, TXD3) +
1.8ns
RGMII2_TXCTL
36939
2540 µm
RGMII2_TXD0
34758
RGMII2_TXD1
31471
RGMII2_TXD2
47854
RGMII2_TXD3
41471
RGMII2_RXC
27366
RGMII2 Receive
1
AVERAGE_LENGTH(RXCTL, RXD0, RXD1, RXD2, RXD3) +
1.8ns
RGMII2_RXCTL
28420
2540 µm
RGMII2_RXD0
28627
RGMII2_RXD1
28431
RGMII2_RXD2
31957
RGMII2_RXD3
30883
1
:
These signals are not length matched on the SOM and the differences in length matching will need to be accounted for in your own custom carrier board design.
7.2.2.3
Industrial Ethernet Peripheral
For industrial ethernet peripheral (IEP) the following two changes need to be accounted for:
•
Connect ETH_LINK to LED0 on the Ethernet PHY
•
Connect ETH_ERR to either LED1 on the Ethernet PHY or pull down to ground.